Process of making size-powder.



- llnrrnn drains Parana FHCE.

LUDYVIG BEEOK, OF OREFELD, GERMANY;

PROCESS OF MAKING SIZE-POWDER;

SPECIFICATION forming part of Letters Patent No. 644,889, dated March 6, 1906.

Application filed April 11 1899. $erial No. 712,664. (NospecimensJ To aZZ whom it may concern.-

Be it known that I, LUDWIG BEECK,'n1anufacturer, a subject of the Emperor of Germany, residing at'38 Prinz Ferdinandstrasse, Orefeld, in the Kingdom of Prussia and Empire of Germany, have invented certain new and useful Improvements in Processes for Manufacturing Size-Powder, of which the following is a full, clear, and exact description.

The subject of the present invention is a process for manufacturing size-powder to be used with great advantage in decorative painting. In decorating walls and the like they must, previous to painting proper,have a coat -1nass results from the whole.

of suitable priming to make them fit to receive the color and to retain the same. A priming has hitherto been used consisting of soap, alum, and glue, and to apply this the soap and alumhave been dissolved in water and boiled glue has been mixed with them. This process is tedious and inconvenient and can only be avoided by pulverizing the materials with a view to simply dissolving them on the spot. Pulverization has hitherto been impossible, inasmuch as boiled glue has always had to be used,and this cannot, onaccount of its high elasticity and adhesive nature, be reduced to powder by sil'nply crushing the same. V

The process which is based 011 the present invention enables glue to be pulverized by first steeping it in the ordinary Way and then thoroughly boiling it. While this perfectly fluid boiling hot solution of glue is being poured out, calcined soda or alum or any other salt which by its nature has a similar effect is added in such proportions that a dry Soda or alum takes up the water of crystallization contained in the glue and brings about a complete solidification of the mass, so that it can be easily pulverized, the taking up of the water of.

crystallization by the soda or alum producing complete crystallization. The glue powder thus obtained receives an addition of the requisite quantities of soap and alum for making priming, and the manufacture of the priming-powder is complete. For using the latter it is only necessary for the painter to take a ta-blespoonful of the powder and dissolve it in a liter of warm water to obtain an equal quantity of priming. When the powder is dissolved in warm water, the glue contained in it reobtains its original adhesive qualities and elasticity.

Twenty-four kilograms of glue are soaked in ten kilograms of water for two hours, the glue being thus softened by taking up some of the water. The mass of water and glue is then slowly boiled for about six hours,driving off six to eight per cent. of the water and leaving about twenty per cent. of water retained in the glue solution. To this solution while still hot su iiicient alum or soda is added to saturate the same. If alum be used, eight parts, by weight, of alum will be required to six parts of the glue solution. The yellow solid mass so obtained is exposed to the air for three or four days until it becomes completely hard and is then pulverized in any suitable manner, and then to every six parts, by weight, of the pulverized mass are added six parts, by weight,of alum and two parts,by weight, of pulverized potash soap. The soap which I prefer to use is prepared by drying thin slices of soda soap in the air for several weeks, powdering same, and mixing the powder with potassium carbonate in the proportion of ninety parts, by weight, of dried soda soap to ten parts, by weight, of potassium carbonate.

This invention is therefore based on the discovery that a priming hitherto used in liquid form only can on the score of utility be manufactured in the form of a powder, and thatglue can be temporarily deprived of its elasticity and adhesive qualities.

WVhat I claim, and desire to secure by Letters Patent, is

The process for manufacturing, priming powder, consisting in making a solution of glue by steeping and boiling in water, adding soda, alum or other salt which has the effect of causing the mass to become solid, and when the mass is fully solidified pulverizing same to form a powder which is readily soluble owing to its finely-divided state, and finally adding to the resulting powder alum and pulverized soap, substantially as set forth.

In witness whereof I subscribe my signature in presence of two witnesses.

LUDWIG BEEGK.

Witnesses:

Fnnuz Kox, IIEINR. Kox. 

